2011/8/8 Shankar Viswanathan <[email protected]>: > 2011/8/7 Shirley Márquez Dúlcey <[email protected]>: >>> Recent high-end Radeon and NVidia video cards tend to come with >>> DisplayPort, too. >> >> I haven't seen that; the ones I've seen come with HDMI rather than >> DisplayPort. That doesn't mean that all of them do, but if I'm spending I'd >> rather have an HDMI port. DisplayPort never really caught on with anybody >> other than Apple, and it strikes me as a standard that has no good reason >> for existence; what technical advantage does it have over the more widely >> adopted HDMI? (I'm prepared to be enlightened if it actually has one.) > > DP has two main differences compared to HDMI, one non-technical and > one technical: > 1. DP is an open royalty-free standard supported by VESA, HDMI has > royalties per connector. One is free to extend the DP standard for > customized applications (e.g. embedded markets) > 2. DP allows for a 720Mbps AUX channel that could be used for data > transfer. Most practical use is for touchscreens, DPMS and for using > it for USB data (think USB hubs in the monitor without needing a > separate USB cable). HDMI allows for a relatively low-speed "Consumer > Electronics Control" channel and is used by several consumer > electronics vendors for vendor-specific remote controls (e.g. Sony > BluRay player talking to Sony TV or Sony A/V receiver). DP also > supports multiple audio/video streams over the same cable. > > Practically, you'll find most computer/graphics card vendors > supporting both DP & HDMI, though some may have only DP ports and ask > you to buy a separate DP -> HDMI dongle to connect to your TV (thus > passing the HDMI royalty fee to the dongle). IMHO, the DP connector is > more robust compared to HDMI. > > A point to note is that both standards are continually evolving, and > the technical differences between the two are getting blurred with > each revision.
I've been following this discussion and been confused because I don't think I've ever even seen a card with a DP port. I did a quick survey of graphics cards available on-line at Microcenter and I think I know why. None of the cheapest ten graphics cards had DP (some had DVI as well as HDMI). More then 50% of the most expensive cards had DP. I'm not into heavy graphics/gaming so in my universe DP doesn't exist. That's a bit surprising if DP is royalty free, but it is what it is. Bill Bogstad _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
